Wp.,g,gg - Imprex USA

lmpregnation
An Overview
Wp.,g,gg,'
lntruduction
lmpregnation is the fastest, most eftective process for eliminating the inherent
problems of porosity in cast and powdered metal.
Why eliminate porosity?
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To
To
To
To
prevent leakage of fluids and gases
prevent plating defects
increase machinability
reduce scrap and increase profits!
Properly processed castings are clean and have no change in appearance or
dimensions. Castings can be impregnated in the rough, or fully machined.
The physical seal in lmprex-impregnated castings is permanent. lmprex sealants will withstand pressures equal to the bursting point of the component.
Our sealants are impervious to all but the most aggressive acids and caustics.
ln almost all cases, the parent metal will deteriorate long before the impregnant is affected.
Porosity can be caused by numerous factors in the design, tooling or pouring of
castings and forming of P/M paris. Cold shuts, enclosed gas bubbles and poor
metal flow will all cause porosity in metal.
Porosity can change in size
and shape throughout the
casting wall. What is seen
on the surface is seldom
an accurate picture of
what is inside.
Basically porosity, regardless of cause, can be classified as:
1. Enclosed Porosity
This type would not
cause a problem in a
casting unless it is exposed in a subsequent
machining operation.
2. Blind Porosity
Blind porosity can lead
to internalcorrosion,
spotting or blow-out of
any finishing coating.
3. Through Porosity
This sometimes occurs
in as-cast areas of cast
ings, but usually appears
in machined areas. This
type of porosity will
obviously cause leakage
through a wall section
of an otherwise sound
casting, which must be
scrapped or reclaimed
by impregnation.
What Does
lmprex Mean?
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M PREX
MEANS IM PREGNATION.
From castingsand powdered metal parts
to electrical and electronic components,
our only business is impregnation.
We are the experts
IMPREX MEANS EXPERIENCE.
With a managemeni and sales staff that
averages over twenty years per person
of first-hand experience, you have a
resource that will quickly and effectively solve your impregnation problem.
There is no substitute for handson experience.
IMPREX
M
EANS
R
ELIABILITY.
Since 1950 we've conceived, built and
tested literally hundreds of systems,
concepts and formulations. Whether you
are buying our equipment or impregnating with our materials, you know you
have the best products available today.
IMPREX MEANS QUALITY.
We've spent almost forty years building
our business and our reputation. We've
continually researched and upgraded
our products to insure you the finest
materials and the best service. When
you come io lmprex, we've earned your
trust. And we're Proud of it.
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Powdered Metal
Applications
We specialize in supplying easy-to-
control, economical products that
are effective for sealing powdered
metal components.
lmprex-impregnated P/M parts have
these advantages:
1
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Excellent Machinability
Porosity in powdered metal
causes chatter, resulting in
reduced tool life. When porosity
is filled with lmprex resin, chatter is eliminated and tool life is
extended up to 1000%.
WITH IMPREGNATION
WITHOUT IMPREGNATION
WITH IMPREGNATION
WITHOUT IMPREGNATION
WITH IMPREGNATION
WITHOUT IMPREGNATION
2. Excellent Plateability
The porosity in powdered metal
will absorb oils, deburring fluids,
pre-plating cleaners and acids that
can later cause spotting on the
plated surface. I mpregnation f i lls
voids and eliminates spotting.
3. Pressure Tightness
ntercon nected porosity can
cause leakage of gases, fuels,
hydraulic oils, and so on through
the wall section of the part.
lmprex impregnation fills this
porosiW, eliminati ng leakage.
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Primary lmpregnation
Processes
WET VACUUM APPLICATION
FEATURES:
rtii Less
ffiEffi
capital equipment required
Less space needed
dill Fast cycle time (10-12 minutes)
li,ir Easy to operate
,ri;i Can be used as a resin system
rljrl
CHAMBEB
WATER
RESIN
IMPREGNATION RECOVEBY
10-20 minutes
TIME
Approximately
15 minutes
per load
2-4
RINSE SPRAY/DRAIN
minutes
1-4
CURE
minutes
CURING TIME
Hot water,
10 minutes
at 1950
F
DRY VACUUM-PRESSURE
APPLICATION
FEATURES:
Cycle time of 20-30 minutes
Maximum sealant Penetration
into porosity
' Optimum sealing results possible
for high-pressure requirements
Required process for comPliance
with MIL-l-'175638
Can be used with resin or sodium
silicate impregnants
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RESERVOIR PBESSUBE RESIN
VESSEL
RECOVEBY
10-20 minutes
WATER
2-4
llsool
RINSE SPRAY/DRAIN
minutes
1-4
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minutes
IMPREGNATION
CURE
CURING TIIVE
Hot water,
10 minutes
TIIVE
at 1950
Approximately
45 minutes
per load
F
QU ICK-SHOT APPLICATION
(Patented Process)
FEATURES:
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No baskets required
Even less space required than for
wet vacuum system
Minimum amount of startup charge
of resin
Lends itself to automated transfer
lines
HHH IET
DBY
MULTI-PUBPOSE CHAMBER
WET VACUUM RESIN
VACUUM
IMPREGNATION RECOVERY
l-2 minutes
1-2
minutes
(CENTRIFUGE)
1-2 minutes
WATER
2-4
RINSE SPRAY/DRAIN
minutes
1-4
minutes
CURE
CURING TIME
Hot water,
10 minutes
at 195o F
fur^,F-F,,x:
Over many years of business, our goal
has always been to offer our customers
the most effective products combined
with the fastest service available.
We knew we couldn't do it from a single
location. So over the years we authorized
strategically-located f irms that meet our
high quality siandards to offer you impreg-
nation with lmprex sealants. Today you
can find our affiliated job shops in over
forty locations th?oughout the United
States, Canada, Mexico and Europe.
We are intensely proud of our name and
reputation. Close contact with every
job shop means you can be assured of
the same technical competence and
commitment to service from them that
you receive at our home office and
plant. Depend on fast turnaround and
mprex rel iabi ity at your I mprex-aff iliated
job shop. lf you'd like a sample-parts
processing free of charge, call your
localjob shop or call us directly.
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lmprex, 1nc.,3260 South 108th Street, Milwaukee, Wl 53227 USA.Website: http://www.imprexusa com
.
(414) 321-9300
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Fax (414) 321-9086